Yinshanpo KC261a, Qingyan (Triassic to of China)

Where: Guizhou, China (26.3° N, 106.7° E: paleocoordinates 13.3° N, 95.1° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Qingyan Formation, Pelsonian to Pelsonian (247.2 - 242.0 Ma)

• Bed 4 (units KC 259-262) is 80 m thick. About 200 m above base of Qingyan Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, green, yellow shale and lithified, gray marl

• Evaporative basin in Sichuan and north Guizhou separated from open marine to south in Yunnan and Guangxi by biohermal belt, located just north of Qingyan. The area near Qingyan was a prebiohermal facies. (Apparently fore-reef or something equivalent, located on the slope?)
• Qingyan Formation consists mainly of gray to yellowish-green noncalcareous shale, pale-to dark-gray marl, calcareous shale, and argillaceous limestone, usually thin-bedded. Most of the fossils are collected from the shale and marl.

Size class: macrofossils

Primary reference: H.-F. Yin and E. L. Yochelson. 1983. Middle Triassic Gastropoda from Qingyan, Guizhou Province, China: 1 - Pleurotomariacea and Murchisoniacea. Journal of Paleontology 57(1):162-187 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 44253: authorized by David Bottjer, entered by Matthew Clapham on 07.09.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Murchisoniina - Wortheniellidae
"Glabrocingulum (Ananias) joannisaustriae" = Rinaldoella johannisaustriae
"Glabrocingulum (Ananias) joannisaustriae" = Rinaldoella johannisaustriae Klipstein 1843 snail
 Murchisoniina - Phymatopleuridae
Worthenia sp., Worthenia (Humiliworthenia) nuda n. subgen.
Worthenia sp. de Koninck 1883 snail
Worthenia (Humiliworthenia) nuda n. subgen. Koken 1900 snail
 Euomphalina -
Triassocirrus guizhouensis n. gen. n. sp.
Triassocirrus guizhouensis n. gen. n. sp. Yin and Yochelson 1983 snail